Add LSP server support for Meson and CMake.#145

PerilousBooklet wants to merge 3 commits intolite-xl:masterlite-xl/lite-xl-lsp:masterfrom

PerilousBooklet:PR_lsp_meson_cmakePerilousBooklet/lite-xl-lsp:PR_lsp_meson_cmakeCopy head branch name to clipboard